Upper cylinder lubrication of internal combustion engines



Feb, 9, 1932. G. P. INNES 4 1,844,764

UPPER CYLINDER LUBRICATION OF INTERNAL COMBUSTION ENGINES Filed Jan. 4, 1929 II/Il/I/l II/I/Il/l/ Patented Feb. 9, 1932 UNITED STATES PATENT OFFICE enonon rmcocx mm, or wous'romcnur, um sr'mwr, m scum warns,

ausrmm, assronon' ro nor msroan nmavn, mnoonoorrnmr, mun nma- BANE, QUEENSLAND, AUSTRALIA UPPER CYLINDER LUIBIB-ICATIQN OF INTERNAL OOKBUS'I'ION ENGINES Application filed January 4, 1929, Serial No.

This invention relates to the upper cylinder lubrication of and in internal combustion engines namely to the internal lubrication of the cylinders aboveand about the piston tops with the object of lubricating them more effectively than has heretofore been possible and refers to a novel method and improved devices. Generally, in the old methods of lubrication of such upper cylinder parts a common defect is that the cylinders and valves are flooded more or less with lubricating oil at those times when a relatively large quantity is not required as when the engine is idling and are supplied with little or no oil at the required and necessary times as when the engine is under load. This invention comprises a novel method and an inexpensive and simple lubricatorwhich in arrangement and in connection with the indraft in the cylinder intake manifold will ensure that the lubricating oil will be suppned as a vapour co-mingled with the fuel and in quantity proportionate to thesupply of fuel to the upper cylinder parts when the engine is working under load or on the main throttle,

such lubricant-charged air into said intake; manifold at a point between the carburettor:

and the throttle.

And according to this invention a novel and peculiarly constructed lubricator is provided which comprises a shallow closed bowl or container preferably spherical in form which has an open pipe connecting with the atmosphere and passing through a cap on the bowl and terminating within the bowl near the bottom thereof. In the lubricator cap is provided a regulating valve and a feed pipe 830,235, and in Auntrglia January 16, 1988.

therefrom is led to the intake manifold and enters thereto at the desired point hereinbefore mentioned.

And in order that this invention may be advantageously carried into practical effect, the upper cylinder lubricator and the operative utilities thereof according to said invention will now be fully described with reference to the drawings accompanying and forming part of this complete specification, in which Fig. 1 is a perspective elevation of an upper cylinder lubricator of the presently preferred construction connected to a cylinder intake manifold at a point inwardly of the carburettor and outwardly of the throttle. Fig. 2 is an elevation of the lubricator bowl with holding bracket suitable for ailixture to the cylinder chest wall or other flat conveniently handy surface though any other and preferably similar holding bracket may be used and Fig. 3 is a partial cross-sectional view thereof taken on line 33 of Fig. 2.

The holding bracket 5 has a flange 6 with screw or bolt holes 7 for aflixing it to a convenient wall or base say the engine dash board and it has an upper fixed arm 8 and a lower lever arm 10 forming a clamp between which is removably supported a shallow preferably transparent glass bowl 14. The arm 8 terminates in a cap 9 in which neatly fits the neck 15 of bowl 14. The lever arm 10 is fulcrumed at 11 and has a draw-in screw 12 whereby its outer end is closed upwardly on the bottom of bowl 14 pressing and/or clamping said bowl firmly between its end and the cap 9 surrounding the bowl neck 15 preferably against a washer of cork or felt or the like 15A. In the cap 9 is a screw down valve .15 through a gland 16A between port 17 from jthebowl 14 and port 18 to exit feed pipe 19 ,aflixed thereto by union nut 20. In this cap 9 also is port 21 to which is secured by union nut 22 the air intakepipe 23 with a conveniently positioned open end and from this port 21 the internal air supply pipe 24 extends downwardly to close to the bottom of bowl 14. The lower centre point of bowl 14 has a bulb 25 (which may be hollow and form a receptacle for sludge) on the outside of which fits complementary recess 13 of lever arm 10.

The feed pipe 19 is led to the fuel supply pipe 31 of the cylinder intake manifold 30 and enters said manifold ordinarily at a point 32 between the throttle 33 and the carburettor (not shown) that is the entry to the manifold is between the carburettor and the throttle as shown in Fig. 1.

In use the bowl 14 is kept supplied with lubricant and it is clamped between arms 8 and 10 or the engine may be run as say with the carburettor choke closed and the pipe 23 inserted in an oil supply can when the suction of the engine will draw the oil into the bowl 14. In such operation care must be exercised to prevent the oil siphoning out again when the supply can is removed.

To lubricate the upper cylinder parts each engine cylinder on its suction stroke will draw air through pipe 23 and discharge it through pipe 24. below the bulk of the lubricant through which it passes or bubbles and a. lubricant charged vapor will be drawn through port 17 through valve 16. opening of this valve is regulated as well understood to allow the passage of that quantity of the vaporized lubricant as experience or experiments decide is suitable for the particular engine.) Then under suction impulse this vaporized lubricant finds entry through port 18 and feed pipe 19 to the cylinder through the intake manifold 30 at the point 32.

It will be seen that when the throttle 33 is closed or nearly closed at which time the negative pressure or suction is greater or greatest inwardly of the throttle valve that this suction cannot and does not affect the suction in pipe 19 and consequently the feed of vaporized lubricant is nil or but of minute quantity according to the opening of the throttle to assure idling of the engine.

It is understood that the mechanical constructions and combinations and arrangements herein described and shown may be varied considerably by those skilled in the art to which this invention appertains and that the inventor does not confine himself precisely to those hereinabove set forth and explained.

I claim 1. The combination with an internal combustion engine, of means for lubricating the upper portions of the cylinders of said engine comprising a shallow reservoir containing a lubricant and having a pipe from the bottom thereof leading to the atmosphere, another pipe from the top of the reservoir connecting to the fuel supply pipe on the input side of a throttle located in said supply pipe, whereby on the opening of the throttle air is drawn through the lubricator into the engine.

2. The combination with an internal combustion engine, of means for lubricating the upper portions of the cylinders of said engine comprising a shallow, ovate reservoir contain- (The ing a lubricant and having a pipe from the bottom thereof leadin to the atmosphere, a second pipe connected etween the top of the reservoir and fuel supply pipe whereby a vacuum or suction is created to suck air into said reservoir to vaporize the lubricant and to simultaneously feed the vaporized lubricant to the supply pipe where it is mixed with the fuel, and a throttle in the fuel supply pipe located between the intake manifold and the point where'the lubricant-fed pipe is connected to said supply pipe whereby the vaporized lubricant is fed to the cylinders on the opening of the throttle.

3. The combination with an internal combustion engine, of means for lubricating the upper portions of the cylinders of said engine comprising a shallow, ovate reservoir containing a lubricant and having a pipe from the bottom thereof leading to the atmosphere, a second pipe connected between the top of the reservoir and fuel supply pipe whereby a' vacuum or suction is created to suck air into said reservoir to vaporize the lubricant and to simultaneously feed the vaporized lubricant to the fuel supply pipe where it is mixed with the fuel, a throttle located in the fuel supply pipe between the intake manifold and the point where said second pipe is connected to said fuel supply pipe whereby the vaporized lubricant is fed to the cylinders on the opening of the throttle, and means for regulating the supply of vaporized lubricant to be fed to the fuel supply pipe.

In testimony whereof I have signed my name to this specification.

GEORGE PEAGOCK INNES. 

